Need Help Powering my Monitor 70s

Djbuddy

I use my monitor 70s along side cs 2 center channel and two old onkyo surround speakers, to watch alot of blu-ray movies and listing to music. I have already blow my tweeters twice on the monitor 70 speakers while listing to music at high volumes, no distoration they just stop working.I currently have a ht560 onkyo hometheather reciver, which puts out roughly 85 watts per channel. I want to know is lack of power causing the tweeters to blow, and if yes what kind of home theather reciver can i get to power these puppies so i can crank them up without worries, i really want to stay in $600 range

Matt34

Djbuddy wrote: »

I use my monitor 70s along side cs 2 center channel and two old onkyo surround speakers, to watch alot of blu-ray movies and listing to music. I have already blow my tweeters twice on the monitor 70 speakers while listing to music at high volumes, no distoration they just stop working.I currently have a ht560 onkyo hometheather reciver, which puts out roughly 85 watts per channel. I want to know is lack of power causing the tweeters to blow, and if yes what kind of home theather reciver can i get to power these puppies so i can crank them up without worries, i really want to stay in $600 range

I don't know what you consider loud but you may be clipping the amp in the avr, that will blow tweeters if that's the case. Right now I'm running my M70 off a single Emotiva BPA-1 but I also have them crossed over at 80hz to my subs so the load wasn't as difficult. If you are running the monitor 70 full range and have a sub available you might want to try intergrating the sub with the speakers to take some of the load off them, thus requiring less power from the AVR.

I'm assuming your AVR is one from a HTIB setup? You may want to look at the Adcom GFA-555(II) on ebay and pair it with a pre of your choice. You can pick up the amp for under $300 regularly and another AVR with pre-outs is not hard to find in the $300 range either.

Ron Temple

Those Onk HTIB receivers are based on the 5xx platform, not bad, but certainly the specs are suspect. Matt's pointed you in the right direction. If you're blowing tweeters, it's probably due to clipping the AVR at extremely loud levels. Turn it down or get a more capable AVR, then still keep it reasonable. You need lots of clean power for loud playback without risk of damage to speakers (not to mention ears).

Djbuddy

Im not a pro in the home audio area, but what is clipping dont want to sound like a newb but i just never heard of that term. Can it also be a user set up error causing the tweeters to blow, i use the mic that came with the reciver to set up all the levels and crossovers for the htib.

Matt34

Djbuddy wrote: »

Im not a pro in the home audio area, but what is clipping dont want to sound like a newb but i just never heard of that term. Can it also be a user set up error causing the tweeters to blow, i use the mic that came with the reciver to set up all the levels and crossovers for the htib.

http://en.wikipedia.org/wiki/Clipping_(audio)

royalty

Can you tell if its clipping by how the speakers sound?

royalty

like the sound of the tweeters....would it be very bright sounding?

NJPOLKER

Some distortion right before nothing.

cnh

Yes....it's called 'distortion'.

Monitor 70s are notorious for clipping on weak amps and popping their tweeters. I've run mine off a Denon 2807 which is a 31 lbs, 110 watt/channel unit. Never had any problems, I added an Adcom GFA-555 into the mix and they'll play as loud as you want with no problems. If you want to play unreasonably loud...get good external amplification!

Also, I've found with the M70s you shouldn't PUSH them too hard during the break-in period. A lot of people pop their tweeters during that time!

cnh

Matt34

royalty wrote: »

like the sound of the tweeters....would it be very bright sounding?

The sound becomes compressed, like your missed notes because the amp cannot supply enough power at high volumes. It should be fairly easy to detect.

HotInEER

I currently have the monitor 70's and they sound great with my Onkyo TX-SR606. You can typically find good deals on this receiver...Well worth the money.

notChris

Hi. This is my first post in the Polk forums. Hello to everyone.

I am deeply considering getting the Monitor 70s.

Would bi-amping help give the Monitor 70s more headroom? I have a Denon AVR-890 and I have the option to bi amp. Given that it runs normally at 105 watts per channel...does that mean that if I bi-amp those Monitor 70s they will be getting 210 watts a piece? Just wondering if that is how the math works and if that would make any noticeable difference.

notChris

Yes.

notChris

xcapri79 wrote: »

Does this help?

Absolutely. Thanks. They will start as two channel and then it will eventually be 5.1. I will add speakers as I get money.

I snuck downstairs a few times already and listened to some classical albums at night on these old Sony's I have and the receiver has even made them (sonys) sound better. So I cannot wait to get some better speakers for it. After reading some of the posts about the Monitors being good for music that has pushed me more towards them too. My friend has some Monitor 70s so I am going to bother him and let me go listen. Thanks again for the quick reply!

notChris

Just a quick update on an ancient post...I got the monitor 70s and I bi amped them and they sound great! Thanks!

cnh

Glad you like those...they are a nice sounding speaker and a good Denon will bring out a lot of that, if you add a power amp into the mix....they sound even better..

Stick around and post a bit more if you'd like to....lots to learn/share?

cnh

wutadumsn23

+1 cnh, I love my 70's!!

-Jeff